Homura exits her Magical Girl form and returns to her school uniform she was wearing in one shot, however in the next shot she is wearing her Magical Girl outfit again, then she is back in her school uniform in the following shot.
Mami's gloves appear and disappear frequently through out the time in Charlotte's barrier.
Outside the hospital after the Labyrinth disappears, the bike rack layer is underneath the garden bed's and there are few, if any, shadows despite the time of day being dusk.